Episode Synopsis: The Big Bang Theory Season 7 Episode 9 “The Thanksgiving Decoupling” – Sheldon protests when the gang drags him to Mrs. Wolowitz’s house for Thanksgiving. Meanwhile, Penny and Leonard must deal with a mistake from her past, on THE BIG BANG THEORY, Thursday, Nov. 21 (8:00 – 8:31 PM, ET/PT) on the CBS Television Network.